Econoline E250 3/4 Ton V8-5.4L CNG VIN M (1998)
Spark Plug: Specifications
Torque
Spark Plug Gap ...................................................................................................................................................................... 1.32-1.42 mm (0.052-0.056 in)
Spark Plug Torque ................................................................................................................................................................................ 9-20 Nm (7-14 Lb/Ft)